// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_VIEWS_WIN_SCOPED_FULLSCREEN_VISIBILITY_H_
#define UI_VIEWS_WIN_SCOPED_FULLSCREEN_VISIBILITY_H_

#include <windows.h>

#include <map>

#include "base/macros.h"
#include "ui/views/views_export.h"

namespace views {

// Scoping class that ensures a HWND remains hidden while it enters or leaves
// the fullscreen state. This reduces some flicker-jank that an application UI
// might suffer.
class VIEWS_EXPORT ScopedFullscreenVisibility {
public:
    explicit ScopedFullscreenVisibility(HWND hwnd);
    ~ScopedFullscreenVisibility();

    // Returns true if |hwnd| is currently hidden due to instance(s) of this
    // class.
    static bool IsHiddenForFullscreen(HWND hwnd);

private:
    typedef std::map<HWND, int> FullscreenHWNDs;

    HWND hwnd_;

    static FullscreenHWNDs* full_screen_windows_;

    DISALLOW_COPY_AND_ASSIGN(ScopedFullscreenVisibility);
};

} // namespace views

#endif // UI_VIEWS_WIN_SCOPED_FULLSCREEN_VISIBILITY_H_
